Nut-lock.



No. 739,594. PATENTED SEPT. 22, 1903.

e. P, FINNlGAN.

NUT LOOK. urmonmn FILED mm. as, 1903.

H0 MODEL.

/ F iii; M Ma I WITNESSES: v v INVENTOH M 6607a .flnflz an,

UNITED STATES Patented September 22,1903.

PATENT OFFICE.

GEORGE P. FINNIGAN, OF GREENE, NEW YORK.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 739,594, dated. September 22, 1903.

Application an March 25, 1903.

To (ZZZ whom it may concern.-

Be it known that I, GEORGE P. FINNIGAN, a citizen of the United States,resid-in g at Greene, Chenango county, New York, have invented certain new and useful Improvements in Nut- Locks, of which the following is a full, clear, and exact description.

My invention relates to nut-locks, and has for its object the production of a simple and r0 efiective lock for nuts particularly adapted for use where subject to jarring and vibration. I have shown it as used in connecting rails. It is obvious, however, that it may be useful in many other relations.

The following is a description of an embodiment of my invention, reference being had to the accompanying drawings,in which- Figure 1 shows the same in perspective as used for connecting-two rails together. Fig.

2 is a side elevation of the same. Fig. 3 is a view showing the parts in section on a line through the center of the nut. Fig. 4 is a section of the base or fish plate on the line no as. Fig. 5 is a perspective view of the key or wedge. Fig. 6' is a perspective view of the nut.

Referring more particularly to the drawings, A A are two rails, whose ends are connected by the perforated fishplates B B, through which pass the bolts 0 O C O, having nuts D D D D. The plate or base portion B has formed upon it in proximity to the holes through which the nuts pass ver- 7 tical projections E E E E. These projections 5 are not undercut, but are plain-faced, so as to be easily formed. When the nut is righthanded, these projections are preferably placed on the left of the holes, as shownthat is, at the reverse side of the nut. The nuts themselves are undercut, as at f, parallel to their inner edges, so as to form recesses, in which a key G fits. This key is preferably angular, so as to extend into the recess on the top of the nut, as well as down the side, and is firmly held in the recess by the projection E, acting to prevent the nutfrom unscrewing. Any tendency to unscrew re sults in an engagement of the nut with the plate or key G at the point H, thus looking both the nut and key in position. In order to more completely insure the retention of the key G in'place and take up looseness due to stretching of the metal fiber of the bolt, it

is shaped so that it broadens toward the bot- Serial No. 149,455. (No model.)

tom and has a bent or curved spring portion, as at I, sothat it expands to take up any loose play.

The construction constitutes a nut-lock which is simple and effective, as well as easily applied and inexpensive.

lVhat I claim is-* 1. In a nut-lock, the combination of a perforated base portion having a projection formed thereon, a bolt passing through the same, a screw-threaded nut thereon having an undercut parallel to its inner edge and a key interposed in said recess and bearing against said projection and having a curved spring portion between said not and said base portion, said spring being held compressed by said nut.

2. In a nut-lock, the combination of a perforated base portion having a vertical plainfaced projection formed thereon, a bolt pass ing through the same, a screw-threaded nut thereon having an undercut parallel to its inner edge and a key interposed in said recess and bearing against said projection and fitting in the undercut on the top of said nut.

3, In a nut-lock, the combination of a perforated base-plate B having a projection E,

a bolt 0 having a nut D with an undercutf,

in combination with a key G having a curved spring portion and fitting in said undercut f and bearing against said projection, said spring being held compressed by said nut.

4. In a nut-lock the combination of a baseplate, a bolt passing through the same, a nut thereon-having an undercut. recess parallel to its inner edge, said plate having a projec- 0 tion with a plain vertical face and an L- shaped key between said nut and said projection, said key having its lateral projection extending over the top of said nut.

5. In a nut-1ock, the combination of a per- 5 forated base-plate B having a projection E,

a bolt 0 having a nut D with an undercutf, in combination with a dovetailed key G having a curved spring portion and fitting in said undercut f and bearing against said projection, said spring being held compressed by said nut.

Signed at Greene, New York, this 19th da of March, 1903.

. GEORGE P. FIN NIGAN.

Witnesses:

W. E. WHITE, EZRA B. WHEELER. 

